Pool Mate pH Up for Swimming Pools - 25 lb Container, Sodium Carbonate Formula for Fast pH Correction

Pool Mate 25-Pounds Premium pH Up is a sodium carbonate-based pool chemical that raises low pool pH quickly and reliably when used as directed.

Maintaining proper pH keeps your pool water comfortable, protects surfaces and equipment, and helps sanitizers work efficiently. Pool Mate pH Up comes in a 25-pound container formulated for residential and commercial pools. It’s designed to be pre-dissolved and added while the circulation system runs, making it easy to correct pH that tests at 7.2 or below and to bring it into the recommended range of 7.4–7.6.

How do I use Pool Mate pH Up safely and effectively?

Begin by testing pool pH with a reliable kit. If the reading is 7.2 or lower, consult the included dosing chart, pre-dissolve the measured amount in a plastic bucket, then slowly pour the solution around the pool perimeter while the pump is running. Allow the circulation system to run for at least one hour, then retest and repeat dosing if needed until pH reaches the desired level.

• Test pH before adding any chemical and after each dose.
• Always pre-dissolve the powder in a plastic pail—do not add dry granules directly to the pool.
• Pour solution evenly around the pool with the pump on for proper distribution.
• Retest after one hour and repeat dosing if pH remains low.

What exactly is in this product and how does it change pool chemistry?

Pool Mate pH Up is formulated from sodium carbonate, a widely used alkaline compound that increases total alkalinity and pH when dissolved in water. The alkaline ions neutralize excess acidity, shifting pH upward and stabilizing water chemistry when used with balanced alkalinity and sanitizer levels. Proper pH protects plaster, tile, metal fittings and pool liners from corrosion or etching caused by acidic water.

• Active ingredient: sodium carbonate (alkaline pH increaser).
• Raises pH quickly while also contributing to total alkalinity.
• Helps reduce risks of surface etching and metal corrosion.
• Compatible with standard pool sanitation systems when used per directions.

How much should I add for different pool sizes and conditions?

The product includes a dosing chart to estimate amounts based on pool volume and current pH. Start with the recommended dose for your measured pH and pool size, then retest after circulation. Pools with very low pH or large volumes may require repeated, staged additions rather than a single large dose to avoid overshooting the target range.

• Use the included chart to match dose with pool volume and pH level.
• Apply incrementally—retest after one hour before adding more.
• Adjust based on alkalinity readings if stability is an issue.
• Seek professional water test for commercial or complex systems.

Will this product affect sanitizer levels or other chemistry?

Raising pH with sodium carbonate has minimal direct effect on sanitizer concentration, but pH influences sanitizer performance: high pH reduces sanitizer effectiveness while low pH accelerates corrosion. Balancing pH to the recommended 7.4–7.6 helps sanitizers work as intended. Always check chlorine or salt system readings after major pH adjustments and compensate as necessary.

• pH affects sanitizer activity—keep pH within recommended range.
• Retest free chlorine or salt output after pH corrections.
• Combine with regular alkalinity checks for stable chemistry.
• Adjust slowly to avoid rapid swings in water balance.

Who is this for: Pool Mate 25-Pounds Premium pH Up is for homeowners, pool service professionals, and facility managers who need a dependable, bulk-sized alkaline pH increaser for routine pool maintenance. It’s suited to plaster, tile, vinyl and fiberglass pools that require periodic pH correction—ideal for those who prefer pre-dissolving additives for safer, more even distribution. Follow label directions and local regulations when storing and handling pool chemicals.